We point out that the gravitational-wave event GW150914 observed by the LIGO detectors
can be explained by the coalescence of primordial black holes (PBHs). It is found that the …

We discuss the weak gravitational field created by isolated matter sources in the Randall-Sundrum
brane world. For the case of a single wall of positive tension, the field stays localized …

A small mass particle traveling in a curved spacetime is known to trace a background
geodesic in the lowest order approximation with respect to the particle mass. In this paper, we …

A natural phenolic compound, protocatechuic acid (3,4-dihydroxybenzoic acid), is present
in many edible and medicinal plants. Recent studies, including our animal experiments, …

Oral cancer is one of the major global threats to public health. The development of oral
cancer is a tobacco‐related multistep and multifocal process involving field cancerization and …

Chemokines are a family of peptides originally identified as the factors regulating the migration
of leukocytes in inflammatory and immune responses. Recently, they have been shown …

The objectives of the DECi-hertz Interferometer Gravitational Wave Observatory (DECIGO)
are to open a new window of observation for gravitational wave astronomy and to obtain …

This article reviews current understanding of primordial black holes (PBHs), with particular
focus on those massive examples ($\gtrsim $$10^{15}~{\rm g} $) which remain at the present …

DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese
space gravitational wave antenna. The goal of DECIGO is to detect gravitational waves from …

We consider the dynamics of a multi-component scalar field on super-horizon scales in the
context of inflationary cosmology. We present a method to solve the perturbation equations …